Elephant Database
African Elephant Specialist Group

Sierra Leone, 2007

All Years for Sierra Leone: 201620132007200219981995

2007 Summary Totals for Sierra Leone

Data Category Definite Probable Possible Speculative
Informed Guesses008020
Other Guesses000115
Totals 20060080135

Interpretation of Changes in Estimates from Previous Report

Cause of Change Definite Probable Possible Speculative
New Guess00+80-30
Data Degraded00-5-40
Totals00+75-70

Area of Range Covered by Each Data Category (km²)

Data CategoryKnown RangePossible RangeTotal Range
Informed Guesses3580358
Other Guesses349356705
Unassessed Range265476742
Totals9728321,804

Sierra Leone : Elephant Estimates

Cause ofSurvey Details2 Number of Elephants Area Map Location
Input ZoneChange1TypeReliab.YearEstimate95% C.L. SourcePFS3 (km²) Lon. Lat.
Bagbe River ForestDDIG3E19955 45*A. Kortenhoven, pers. comm., 20021349 11.1W 9.3N
Gola East Forest Reserve-OG3E198760Grubb et al., 19981287 11.1W 7.4N
Gola North Forest Reserve-OG3E198750Grubb et al., 19981242 10.9W 7.6N
Outamba-KilimiNGIG3D200680 20*A. Nandjui & E.K.A. Danquah, pers. comm., 20061358 12.1W 9.7N

* Range of informed guess

1Key to Causes of Change (only tracked since 2007): DA: Different Area; DD: Data Degraded; DT: Different Technique; NA: New Analysis; NG: New Guess; NP: New population; PL: Population Lost; RS: Repeat Survey (RS ́ denotes a repeat survey that is not statistically comparable for reasons such as different season); –––: No Change

2Key to Survey Types: AC: Aerial Count, not specified; AS: Aerial Sample Count; AT: Aerial Total Count; DC: Dung Count; EX: Extrapolation from GIS; GD: Genetic Dung Count; GS: Ground Sample Count; GT: Ground Total Count; IG: Informed Guess; IR: Individual Registration; OG: Other Guess. Survey Type is followed by an indicator of survey quality, ranked from 1 to 3 (best to worst). Survey Reliability is keyed A-E (best to worst) as outlined in this table.

3PFS: Priority for Future Surveys, ranked from 1 to 5 (highest to lowest). Based on the precision of estimates and the proportion of national range accounted for by the site in question, PFS is a measure of the importance and urgency for future population surveys. All areas of unassessed range have a priority of 1. See Introduction for details on how the PFS is derived.

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